最近在用freemarker的时候碰到一个问题,在<#list>中的元素用<#if>进行比较
<#if category.categoryId==categoryId>
结果出现问题如下:
freemarker.template.TemplateException: The only legal comparisons are between two numbers, two strings, or two dates. Left hand operand is a freemarker.template.SimpleNumber Right hand operand is a freemarker.template.SimpleScalar
其原因为左边与右边的类型不一样,将它们类型转换成一样就OK了
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